Corlang — Privacy Policy

Effective date: 2026-08-21

Corlang is built to be private by design. It has no account, no sign-in, no advertising, no analytics, and no third-party tracking of any kind. This policy explains, plainly, what that means.

The short version

Your learning data never leaves your device unless you choose to move it. We do not collect, transmit, sell, or share personal information — because we do not have an account system or any server that stores your data.

What Corlang stores, and where

All of the following is stored only on your device, in the app's private storage:

• Your profile: the name you enter at setup (any name or nickname you like, it is never verified) and which word forms the course uses for you.
• Your progress: streak, days completed, current level, per-day task checks.
• Your vocabulary review data (the spaced-repetition schedule for each word).
• Your quiz and mock-exam attempts and can-do self-checks.
• Your settings: daily goal, reminder time, and voice/haptics preferences.

We never upload any of this. There is no Corlang user database.

When Corlang uses the network

Corlang works fully offline for learning. There is exactly one case in which it sends anything you have written off your device:

1. Optional AI practice (Premium). If you use the AI tutor or AI writing feedback, the text you submit is sent through Corlang's managed endpoint to the AI provider (Anthropic) to generate a reply. What is sent: the text you type, the name from your profile (so the tutor can address you; any nickname works), and, for subscribers, your Google Play subscription token so the server can confirm an active subscription and apply the daily fair-use limit. No progress or review data is ever attached. If you never use the AI feature, no such request is ever made.

Nothing else about your use of the app is transmitted. Corlang does not phone home, and it does not check for updates: on Google Play, updates are delivered by the Play Store itself.

Speech

Pronunciation playback uses your device's built-in Android text-to-speech service. Corlang has no microphone permission, does not record audio, and has no speech-recognition feature.

Backups

Backup and restore is entirely manual and local. When you export a backup, Corlang writes a file to a location you pick; when you import, it reads a file you select. Backups are never created automatically and are never sent anywhere.

Permissions

Corlang requests only these, and each is used for one thing:

• Internet — the optional AI feature described above, and nothing else.
• Notifications — your daily study reminder, if you turn it on.
• Run at startup — so that reminder survives a reboot. It schedules a reminder and does nothing else.
• Vibration — haptic feedback on answers, which you can switch off in Settings.
• Billing — Google Play in-app purchases, handled entirely by Google Play.

Corlang requests no microphone, camera, contacts, location, or storage permission.

Children

Corlang is a general-audience language-learning tool and is not directed at children. Regardless, it collects no personal information from anyone.

Changes to this policy

If this policy changes, the effective date above will be updated and the revised policy published at https://corlang.app/privacy/.

Contact

Questions about privacy: support@corlang.app